Separating-plate for board-cutting saws.



J. W. da -G.. B. BURNS. SEPARATING PLATE PORrBOARD CUTTING SAWS. APPLIOATION FILED JULY 24, 1909.

955,379. Patented Aplj. 19, 1910.

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JOHN W. BURNS AND GEORGE B. BURNS, F NEW WESTMINSTER. BRITISH COLUMBIA, CANADA.

SEPARATING-PLATE FOR BOARD-CUTTING SAWS.

Specification of Letters Patent,

lntentctl Apr. 19, 191.0.

Application filed July 24, 1909. Serial No. 509.455.

Tonall whom it may concern.:

le it known lli-llt we.Y Joux' lV. llt'nxs :intl (li-:onor: ll. li'nxs, citizens ol' the l'nitetl h'tntes olt America7 rcsitlino :it New liest mins-ter, in the lrovinco oi' British Colinn hin, Cunznli. lnive. invented new und useful ln'iprovclnents in Sepurnting-lhites for Board-Cutting Hows. oi: which the following is u speciliczition.

This'. invention relates to' nn nttinfhnient to :i planing niuchiin.x ns' is used for dressing the tops liottonis und edges of n hour-il, which :ltlnrhnzent is designed to he used in conjonction with the hoord splittingcutter hcnal which if the subject of n potent :ipplicntion tiled on thi'.l 10th luy of March, llttlli under Serin] Nrn-82,415); lrv the u c of which heed we aire ennliletl to siinnltuneously split. thc thickness oi1 o hoord which is heim@r dressed on its top`r hottoin und edges in on ordinari' planing nnlchine..

In the use. o the hoord Asplitting; plnner heed which is the suhiect of the patent \p plicution before. referred to, we have experienced dill'iculty in providing :i suitable separating plate thnt will relieve the saws of the weiglit of the upper split board which would otherwise cause undue friction and heating of the saws, and that will also enuhle pressure to he applied to the lower boord to hold it. in Contact with the cutter which surfaces `the under side of the boord,

when this snrfiicing of the under side is performed zitter the. hoard has heen split. 0b-

riously pressure eunnot be applied to the upper side of the hoard to hohl the hoard down on the surfacing cutter, :is suc-h' pressure would nip the. saws between the split hoord. These requirements have heenniet hy the invention' which is the subject of this ap lioation, by the provission of uhorizontal y disposed separating plate the thickness of which isslightly in excess of the cut of the. splitting Saws, and the end of which in 'plan conforms tothe outline of the edges of the saws, one in' advance ofthe other, where the board leaves them.

'lhis 'separating plate is suppm-ted. 'troni the, lied or frame of theA machine-by attach-l lnents laterallyheyondthe width of the hoard being cut, which attachments are ndjustuhle to provide for variation in thickness of the boards being out, ind where the lower surfacing is performed after the boi'nds are split this separating plete is ex l presser han` 5. e

tended over the lower surfacing cutter und is provitlctl with projections laterally be vond the wiilth ol' the hoord to he cut, on which lnternl Aprojections licur nien'ibers from the presser Imi` lo hohl the lower split half ot the honrtl down on the snrfiicii'ig cutter beneath. V

'the invention is Inirticnlurl described in i the followingr specilicntion, reference being nni'tle lo the drawings hy which it is ncconi pinned. in which:

Figure l is a longitudinal sectional elevation through the separating plete showing its relation to tjhc splitting saws und adjecent pin-ts. Fig. 2, n plan of the sinne, Fig. E, :i cross section on the line. A A. in Fig. 2. Fig. il, nn alternative ineens 'for adjnstzihly securingl the. presser platte to the hed of' the ineohine. v

[n these dr-iwings 2 represents the bed of the machine, i5 being the spindles of the edge cutting lie-uds, to which the board splitting saws l nre. .secureth and 5 the presser ber by which under ordiintry use of the machine the board being dressed is held down upon the bottom cutter ti which surfaces the onder side. lt will he noted the. bnr 5 Serres asn weight und slides up and down on the Side rods or spindles on which it is mounted, see Figs. 'i und 3.

Supported horizontally in the plane of the horizontal saws 4 und conforming approxinnitel)r to the outline of their edges Where the hoord leaves them, is the separating plete l() which plate muy he edjustubly sup-f ported in any suitable. nnxnner from the hedA of the. machine hy hitler-:1l projections 11 beyond the width of the hoard to be out. This supportinof means muy either consist of a simple htilt; and washer on erich Side, the thickness of the Washers being varied to the required thickness of the board5'or as shown in Fig. 4, the lateral projections 11 may be vertically disposed and provided with elonfv gated holes 12 A the machine by the holte or screws.

ivhere, as shown in the drawings, the snrfecing is performed after the board has been split, the seperatin plate 1t) is extended to u position' over the and is there laterally extended as at 18 on each side to receive beyond the Width 0i thervv hoard downward project-ions 14; 'from the'- In operation, ltlix for attachment; tothe bed of 'K ow'er suracing cut-ter 6,'1

board is passed through 'l the planer as in the ordinary manner for dressing its top, bottom and edges, in which operation the horizontal saws 4: secured on the same spindle as the edge dressing cutters, simultaneously split the board into two. Where beveled siding is required the spindles 3 are tilted to cut the desired bevel. The upper and lower halt' of the split board pass respectively labove and below the separating plate 10 the rst engaging edge ot which conforms closely to the outline ot both saws, and the saws are thus relieved at once of any friction which the nip of the boards on them might tend to produce, and thus heating of the'saws is-avoided and smoother work on the boards results.

When the surfacing ol the under side oi' the board is performed after the splitting by the horizontal saws the end of the separatj ing plate l() over the bottom surfacingcutter (twill by means of the presser bar 5 hold the under'board do'wn on the cutter.

Where, as with wood easily split, such as cedar7 there is a tendency ot' the after end et the upper board to split away from the under one before it is completely severcdby the saws, and thus leave an uneven surface atthe end of each board7 a spring presser plate i5 secured to any convenientpart/ ot the frame of the machine, as shown inthe is brought to .L l other saw, said plate having lateral ljiearing diately over the splitting saws adjacent to drawing to the presser oar, bear on the upper side ot the board immethe end of the separator lO. Y

Having now particularly described our invention and the manner ol its use, we hereby declare that what we claim as new and desire to be protected in by Let-ters Patent, is:

l. In a wood working machine having horizontally'disposed one in advance of the other on each side to divide the thickness of a boarth means for relieving the saws of the weight of the upper split board said meanscomprising a horizontally disposed plate extending from the edge ot each saw in the.' direction of lnovci'i'ient of the board, projections at one end from this plate beyond the width of the board wh ich the saws are designed to split which projections are provided with elongated apertures for adjustably securing the plate to the trame of the machine by bolts or screws and means .tor supporting the other end of said plate for vertical and horizontal iuljustlnents;

QIn a wood working machine having horiZi-)ntally disposed Saws to divide the thickness oli' aboard, the combination therewith of a separating plate that will relieve the saws of the weight of the upper board when split, of means for' securing the sepa rating plate at one` end to the bed of the machine; and meansfor applying downward pressure to the plate on the end dfarther from the saws. v

lieve the saws ot' the weight ot' the upper 70 board when split and means for applying a yielding pressure, to the upper side of the board' adjacent to the last saw to cut. E

4. In a wood working machine having cutters whereby the top, bottom and edges of a board may be dressed.r and horizontally disposed saws on the spindles of the edgge cutters, the con'ibination therewith et a sept rating plate supported from the bed of the machine outside the width of the board to be 8() dressed said plate being carried from as close as practicable to the two saws to-a posit-ion over the cutter which surfaces the under side of the board at which position-the width 'of the plate is'extendcd beyond' the 85" width of the board to be cut, and means for applying downward pressure to the plate over the cutter which dresses the under side of the board.

In a wood working imicliine,.t\vo saws rotatable'in 'a conm-ion plane and located one in advance of the other, a plate spreader located in thesame plane as the saws and having a portion projected 'into close proximity to one saw and having a portion cut away to receive a projecting part of the members to sustain said plate near one end, upwardly projected bearrng nien'ibers at the other end of said plate, said upwardly ,pro 100 in advance ot the other, a plate spreader lo' catcdin the same plane as thcsaws 'and rhaving a portion projected .into close. proximity I10 to one saw mulhaving a portion eut away to receive a projecting parta-otI the other saw, said plate having lateral bea-ring members to sustain said plate near one end, up-wiu't'lly' projected bearing membersat the other end of said plate, said upwardly pi'ojectcdbeai'- mg members .having slots, a transversely .slotted support to which said upwardly projccted members are bolted for vertical and horizontal adjustment of the plate, and a 12o presser secured to said, transversely slotted support and projected over said plate. v

ln testimony whereof we have signed ournames to this specification in the presence of two subscribing witnesses.

JOHN W. BURNS. GEO. B. BURNS. Witnesses:

N. F. H. BlnntLiN, ,Rownami Bm'i'rAIN. 

